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//------------------------------------------------------------------
// qfixLCD.h
//
// This file contains the class LCD which represents the
// LCD display.
//
// Copyright 2004 by KTB mechatronics GmbH
// Author: Stefan Enderle
//------------------------------------------------------------------
#ifndef qfixLCD_h
#define qfixLCD_h
#include "qfixI2C.h"
#include "qfixI2CDefs.h"
#include "string.h"
static const uint8_t LCD_CMD_CHANGEID = 0;
static const uint8_t LCD_CMD_CLEAR = 1;
static const uint8_t LCD_CMD_PRINTSTR = 2;
static const uint8_t LCD_CMD_PRINTSTRXY = 3;
static const uint8_t LCD_CMD_LIGHTON = 4;
static const uint8_t LCD_CMD_LIGHTOFF = 5;
static const uint8_t LCD_CMD_PRINTINT = 6;
static const uint8_t LCD_CMD_PRINTINTXY = 7;
/**
* \class LCD
* \brief Represents the qfix LC-display.
* \author Stefan Enderle
*
* The class LCD represents the
* physical LC-display and can be used to output text.
* The I2C bus is completely abstracted.
*/
class LCD
{
private:
I2C i2c;
uint8_t id;
public:
/** Default constructor. If only one LC-display is used,
* this constructor can be used. It sets the internal ID to 0.
*/
LCD();
/** Constructor with given ID.
* If two or more LC-displays are used,
* this constructor must be used. It sets the internal ID to the given value.
*/
LCD(uint8_t ID);
/** Change logical device ID
*/
void changeID(uint8_t newID);
/** Clears the display
*/
void clear();
/** prints the string data at the current cursor position.
* The string must end with 0.
*/
void print(char* data);
/** Prints the string data at position line/col. The string
* must end with 0.
*/
void print(uint8_t line, uint8_t col, char* data);
/** prints the integer data at the current cursor position.
*/
void print(int data);
/** Prints the integer data at position line/col.
*/
void print(uint8_t line, uint8_t col, int data);
/** Puts on the backlight.
* \see lightOff
*/
void lightOn();
/** Puts off the backlight.
* \see lightOff
*/
void lightOff();
};
LCD::LCD() : i2c(), id(0)
{
}
LCD::LCD(uint8_t ID) : i2c(), id(ID)
{
}
void LCD::clear()
{
uint8_t buf[2];
buf[0] = id;
buf[1] = LCD_CMD_CLEAR;
i2c.send(I2C_ADDR_LCD, buf, 2);
}
void LCD::print(char* data)
{
int len=strlen(data);
uint8_t buf[len+2];
buf[0] = id;
buf[1] = LCD_CMD_PRINTSTR;
for (int i=0; i<len; i++) buf[i+2] = uint8_t(data[i]);
i2c.send(I2C_ADDR_LCD, buf, len+2);
}
void LCD::print(uint8_t line, uint8_t col, char* data)
{
int len=strlen(data);
uint8_t buf[len+4];
buf[0] = id;
buf[1] = LCD_CMD_PRINTSTRXY;
buf[2] = line;
buf[3] = col;
for (int i=0; i<len; i++) buf[i+4] = uint8_t(data[i]);
i2c.send(I2C_ADDR_LCD, buf, len+4);
}
void LCD::print(int data)
{
int len=sizeof(int);
uint8_t buf[len+2];
uint8_t* ptr = (uint8_t*) &data; // pointer to data
buf[0] = id;
buf[1] = LCD_CMD_PRINTINT;
for (int i=0; i<len; i++) {
buf[i+2] = *ptr;
ptr++;
}
i2c.send(I2C_ADDR_LCD, buf, len+2);
}
void LCD::print(uint8_t line, uint8_t col, int data)
{
int len=sizeof(int);
uint8_t buf[len+4];
uint8_t* ptr = (uint8_t*) &data; // pointer to data
buf[0] = id;
buf[1] = LCD_CMD_PRINTINTXY;
buf[2] = line;
buf[3] = col;
for (int i=0; i<len; i++) {
buf[i+4] = *ptr;
ptr++;
}
i2c.send(I2C_ADDR_LCD, buf, len+4);
}
void LCD::lightOn()
{
uint8_t buf[2];
buf[0] = id;
buf[1] = LCD_CMD_LIGHTON;
i2c.send(I2C_ADDR_LCD, buf, 2);
}
void LCD::lightOff()
{
uint8_t buf[2];
buf[0] = id;
buf[1] = LCD_CMD_LIGHTOFF;
i2c.send(I2C_ADDR_LCD, buf, 2);
}
void LCD::changeID(uint8_t newID)
{
uint8_t buf[3];
buf[0] = id;
buf[1] = LCD_CMD_CHANGEID;
buf[2] = newID;
i2c.send(I2C_ADDR_LCD, buf, 3);
id = newID;
}
#endif
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